[R] Finding the median

Kevin E. Thorpe kevin.thorpe at utoronto.ca
Mon Mar 12 17:44:16 CET 2012

Also, if it is not homework, why are you reinventing some functionality 
already in R?  R can easily calculate medians for you.


On 03/12/2012 12:35 PM, Sarah Goslee wrote:
> Did you try what I suggested?
> If you go to www.rseek.org and search for "odd or even integers" you
> will get various solutions.
> You could even write your own test by comparing x/2 with round(x/2).
> Also, it's good form to copy the list on your replies, not just me.
> Sarah
> On Mon, Mar 12, 2012 at 12:29 PM,<elliot.welch at virgin.net>  wrote:
>> I can't find it that thing. And its not a homework task, I work for a company who require this function to do analysis on some data but we're all new to R?
>> ------Original Message------
>> From: Sarah Goslee
>> To: elliot.welch at virgin.net
>> To: r-help
>> Subject: Re: [R] Finding the median
>> Sent: Mar 12, 2012 16:14
>> Hi,
>> On Mon, Mar 12, 2012 at 12:10 PM,<elliot.welch at virgin.net>  wrote:
>>> I've tried the if function? Its just defining when something is even or odd?
>> R's help system might be useful. www.rseek.org might be useful.
>> You haven't accomplished the second part of my response, and this
>> isn't a homework help list, so you'll need to do your own work from
>> here.
>> Sarah
>>> ------Original Message------
>>> From: Sarah Goslee
>>> To: elliot.welch at virgin.net
>>> Cc: R-help at stat.math.ethz.ch
>>> Subject: Re: [R] Finding the median
>>> Sent: Mar 12, 2012 15:59
>>> I'd start by using if().
>>> If you can convince the list that this isn't homework, you might get more help.
>>> Sarah
>>> On Mon, Mar 12, 2012 at 7:15 AM,<elliot.welch at virgin.net>  wrote:
>>>> Hi just a quick question in which I must use the "function and return" part of R.
>>>> If I was asked to define a function called "median" where the function has a single argument x and returns the median value of a vector. How would I go about saying the median = element x in terms of n (say (n + 1)/2 or whatever it would be) if there is an even amount of elements, or x in terms of n (with a different way of saying how many n) if there is an odd amount of elements?
>>>> Much appreciated

Kevin E. Thorpe
Biostatistician/Trialist,  Applied Health Research Centre (AHRC)
Li Ka Shing Knowledge Institute of St. Michael's
Assistant Professor, Dalla Lana School of Public Health
University of Toronto
email: kevin.thorpe at utoronto.ca  Tel: 416.864.5776  Fax: 416.864.3016

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